Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c1fadada9597834…

MALICIOUS

PDF

83.9 KB Created: 2021-06-26 16:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d51bf1342a51e6c24f7a30a4ec035718 SHA-1: d9dd32a4c612bbff65b598a48058eacf3fd90c3a SHA-256: 3c1fadada9597834313ded5e2db0201eeb68e90fc27340695e041362d905c07b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous links, many pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious URLs, which are designed to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b96c7a44771---zafobibodobax.pdf
    • https://zivotzaokny.eu/res/file/runumavenimivigemol.pdf
    • https://nanyangtextile.com/userfiles/file/lukujegirevibuganetuwerur.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/g4j9ircut5hpnthb6a3qsi6sd3/kadizakomipebesexigek.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/58e1e91bd0a574ee7266a50b4857341f/lovofejisubexi.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3afb4c97e3---49567035947.pdf
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/826baa1e486fde845663df9aa45b3ba9/tufipotex.pdf
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/kelaziferenuw.pdf
    • https://gachbinhduong.com/upload/file/76364497801.pdf
    • https://alarrabnews.com/images/content/content/file/fetojozunevukanunokewabo.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c12d7280219---toxujugajatir.pdf
    • http://15449010.com/FileData/ckfinder/files/20210625_B090F4D3ECF292F5.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16097cc940dcb2---39041682811.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf50b8f07c---16999872668.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/d84986bdb479f57ee137991bb4568b58/65121523081.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/juf9i4p4rcjlpu7ujutv3v9d2m/lawalimafu.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097e2f7829d9---95326948860.pdf
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/c6905c9b3326a3f84dd084c0522f4844/91706752867.pdf
    • http://paintmaster.hu/js/ckfinder/userfiles/files/kovobapefo.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/b5ec0b46291e1baf683d80f6658de625/21022170464.pdf
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/3fcf76a70f6b1096d862d9bf6c27f518/wabape.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/abfc6a706535ff126f368d9e5053d91b/divomez.pdf
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/55e96e3fe5759cf5db3727160fa35a82/63678641108.pdf
    • https://parokisantolukas.org/Uploads/userfiles/files/bonavujununeju.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=the+dolls+house
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb52.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB52 16792 bytes
font_01_sfnt_off00010364.bin
1a72634da49e163abe803fe08432ecd46d3e381097364b3fc33ba55c9e3ff1f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10364 16084 bytes
font_02_sfnt_off00012ccf.bin
9ccab2a1359a64dbbbe1e08c139446c4e902ae4f1cde513df9261b4f857f3c8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CCF 9852 bytes